RENO, Nev. (AP)  Eyes are on Nevada Republican Sen. Dean Heller”s re-election bid, but two U.S. House seats could be key to the Democrats” effort to cut into GOP majorities in Congress.

Democratic Rep. Jacky Rosen”s departure from the 3rd District race to challenge Heller in the Senate, and Democratic Rep. Ruben Kihuen”s decision to forgo re-election in the 4th amid allegations of sexual misconduct puts both seats in play.

The road to November begins in Tuesday”s primaries where ex-congressmen Democrat Steven Horsford and Republican Cresent Hardy are expected to emerge, setting up a 4th District rematch. Hardy unseated Horsford in 2014.

Republican Danny Tarkanian and Democrat Susie Lee are expected to win their 3rd District primaries. Tarkanian succumbed to pressure from President Donald Trump to abandon his campaign for Heller”s seat. Lee has been endorsed by former Vice President Joe Biden.